| Year | 1927 |
| Date | 29-Sep |
| Volume | 57 |
| Issue | 1,377 |
| Page | 299 |
| Category | Workshop Topics |
| Part | |
| Title | Notes on Light-Pattern Independent Chucks |
| Author | |
| Notes | The "Semco" 3-in. independent chuck, key drawing for chuck dimensions, method of holding different shapes of bar, methods odf holding other types of work |